Bolt-cutter



(No Model.)

J. R. RAMBO. BOLT CUTTER.

.No. 598,439. Patented Feb. 1, 1898.

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. held in the hand.

JAMES R. RAMBO, OF PU LASKFTENNESSEE.

BOLT-CUTTER.

SPECIFICATION forming part of Letters Patent No. 598,439, dated February1, 1898. Application filed October 29, 1897. $erial No. 656,790. (Nomodel.)

To all whom it may concern:

Be it known that 1, JAMES R. RAMBO, of Pulaski, in the county of Gilesand State of Tennessee, have invented a new and useful Improvement inBolt-Cutters, of which the following is a specification.

Myinvention is an improvement in the class of hand bolt-cutters whosejaws and cutters proper are adapted to move toward and from each otherin straight and parallel lines.

My device is capable of use for bolt-cutting in general but it isparticularly adapted and intended for use in cutting off the ends oftire bolts, which it does squarely and evenly, leaving no bur, as isdone by machines ordinarily employed for the purpose.

The construction, arrangement, and, opertion of parts are as hereinafterdescribed, and shown in the accompanying drawings, in which 7 Figure 1is a side view of my bolt-cutter. Fig. 2 is an enlarged vertical sectionof the head of the same. Fig. 3 is a cross-section on line 3 3 of Fig.2. Figs. 4 and 5 are detail side and top views of the head of thejaw-lever. Fig. 6 is a perspective view of a portion of the movable jawand its cutter detached.

The hollow narrow right-angular head of my bolt-cutter is formed,mainly,of two parallel side plates 1, which are riveted to an interposed block2, and the enlarged head 3 of a handle 4. The L-shaped jaw 5, carryingthe cutter 6, and the jaw 5, which has no outter, are arranged parallelin such head and slide lengthwise in frictional contact, but in oppositedirections. The means for moving the jaws 5 5 is a compound lever,composed of the handle-lever '7 and the supplemental or jaw lever 8. Thehandle-lever 7 is pivoted to the head 1 of the bolt-cutter at apointadjace'nt to that where the rigid handle 4 is attached and extendsalongside the latter, so

that both maybe conveniently grasped and The jaw-lever 8 is pivoted atits outer extremity to such handle-lever 7 at a point about midway ofthe length of the.

latter, where a slot 9 is provided for the pivotbolt 10, so that thelatter may slide when the bolt-cutter is being operated. The jaw-lever 8has a circular head 11, Figs. 4 and 5, which fits loosely in acorresponding opening 12 in the head 1. From such lever-head 11 pro jectat a right angle to the lever proper, 8., two cylindrical prongs 13,that enter'semicircular notches 14, Fig. 2, formed in the inner adjacentsides of the respective jaws 5 5. Between said prongs 13 and projectingbeyond their outer ends is a pivot-screw 15, which passes through a side1 of the head in opposition to that in which the circular leverhead 11has its bearing. Thus the jaw-lever 8 has a pivot or journal bearing inboth sides 1 of the bolt-cutter head.

It will now be apparent that by opening the handle-lever 7z'-. e.,separating it from the fixed handle Jr-the jaws 5 5 will be openedcorrespondingly, and upon closing the handle-lever 7 the jaws 5 5 willalso close-that is to say, the cutter 6 will approximate the flat headof the shorter jaw 5, as required, to sever an interposed bolt end,which operation it performs with comparative ease owing to the compoundleverage employed. In both opening and closing the jaws 5 ,5 reciprocateor slide in right parallel lines in opposite directions, and by theiroperation on the bolt end sever it smoothly.

The jaws are held in duly close contact by means of an adjustablewear-piece 16, Fig. 2, which is arranged between the L.-j aw 5 and theblock 2 of the head. The same is provided with end flanges, whichprevent longitudinal movement, and its adjustment laterally is effectedby screw-bolts 17, that work through the aforesaid block 2. j

The form of the cutter proper, 6, is not new;

but it is attached and held in place in the jaw 5 by means of a novelconstruction. Said jaw 5 has a cylindrical groove 18 extending entirelyacross its face, and in the bottom of such groove 18 is formed a smallsemicircular groove 19. The cylindrical rib 20 of the cutter 6 fits, butis adapted to slide lengthwise, in the jaw-groove .18 and is providedwith a small semicircular groove 19, that matches the small groove 19 inthe jaw 5, thus forming a cylindrical hole for securing a pin or rivet21,whose function is to prevent rotation of the cutter 6 on its axis. Inorder to prevent lat eral sliding movement of the cutter, its head has anotch 22 to receive a corresponding lug '23 on the jaw 5. (See Fig. 6.)Bythesemeans tached, when dull or broken, by simply driv-.

ing out the pin 21.

What I claim is-- 1. The improved bolt-cutter, comprising a hollow headhaving a rigid handle, the two parallel jaws arranged slidably in saidhead, a handle-lever pivoted to the head, and a jawlever whose head isprovided with projections engaging the respective jaws,and whose outerend has a pivotal and loose connection with the handle-lever, as shownand described.

2. In a boltcutter, the hollow head, the slidable jaws arranged paralleland having semicircular notches, and one of them made L shape, a leverfor operating said jaws, having a circular head that is journaled in theside plates of the bolt-cutter head, and provided with cylindrical,parallel prongs adapted to work in the jaw-notches, as shown and,described, whereby, when the lever is oscillated, the jaws are slid inopposite directions as required.

3. In a bolt-cutter, the combination with the jaw having a cylindricalgroove, of the cutter having a corresponding cylindrical rib, coincidingsemicircular grooves in the jaw and cutter, a pin fitting in the holeformed by such grooves, and the cutter and jaw having an engaging notchand lug, as shown and described, whereby rotary and lateral movement ofthe cutter are prevented and its detachment provided for, as specified.

JAMES R. RAMBO.

Witnesses:

W. H. McOALLUM, N. TATE J ONES.

